Portion of a shoe



FIG. 1 is an outside elevational view of a shoe portion showing my new design;

FIG. 2 is an inside elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a back elevational view thereof; and,

FIG. 5 is a top plan view thereof.

The broken lines in the figure views depict environmental structure that forms no part of the claimed design. 

The ornamental design for a portion of a shoe, as shown and described. 